255/70R16 vs 235/70R17 tire size
235/70R17 vs 255/70R16, diameter
-0.3% shorter
- Speedometer
- 60.2 mph
- At a true 60 mph
- Diameter
- 29.95 in
- Was 30.06 in
- Revs per mile
- 673
- Was 671
- 3% guideline
- Within
Car built for 255/70R16, now on 235/70R17.
255/70R16 and 235/70R17
| Measure | 255/70R16 | 235/70R17 | Difference |
|---|---|---|---|
| Width, mm | 255 | 235 | -20 |
| Sidewall, % of width | 70 | 70 | 0 |
| Rim, in | 16 | 17 | +1 |
| Section height, in | 7.03 | 6.48 | -0.55 |
| Diameter, in | 30.06 | 29.95 | -0.10 (-0.3%) |
| Circumference, in | 94.4 | 94.1 | -0.3 |
| Revs per mile | 671 | 673 | +2 (+0.3%) |
Fitting 235/70R17 instead of 255/70R16
Within the usual 3% diameter guideline.
- Needs 17 in wheels.
- Shorter sidewall: 0.6 in less.
Cars with 255/70R16
What this cannot tell you
Diameter within 3% is a common shop guideline, not a maker spec.
Load index, offset and clearance are not in this data.
- Two or more sources agree
- One source
- Model-level or estimate
- Sources differ